By default, everything is colored to match the Late Harvest theme by pieterh. But perhaps you don't want to use the Late Harvest theme. Well, there is no need to worry because everything can be edited via CSS classes.

Every element uses a CSS class that can be openly edited for customization. The CSS for the notebook elements is found on the notebook:_css page. The page itself has a lot of coding, but the subsections of this page will go through each part one at a time.